'use strict'
const path = require('path')
const rm = require('rimraf')
const defaultSettings = require('./src/settings.js')
const CompressionWebpackPlugin = require('compression-webpack-plugin')
const TerserPlugin = require('terser-webpack-plugin')
const webpack = require('webpack')

function resolve(dir) {
  return path.join(__dirname, dir)
}

rm(resolve('node_modules/.cache'), err => {
  if (err) {
    throw err
  }
})

const name = defaultSettings.title || '登录系统' // page title
const BASE_URL = process.env.NODE_ENV === 'production' ? 'http://118.24.21.156:8087' : 'http://118.24.21.156:8087'// 这个BASE_URL这里没有用到,在request.js里面重新定义了后端接口
const port = 9527
// const port = process.env.port || process.env.npm_config_port || 9528 // dev por

module.exports = {

  /**
   * 如果计划在子路径下部署站点，则需要设置publicPath
   */
  publicPath: '/',
  outputDir: 'dist',
  assetsDir: 'static',
  // lintOnSave: process.env.NODE_ENV === 'development',
  lintOnSave: false,
  productionSourceMap: false, // 生产环境是否生成 sourceMap 文件
  devServer: {
    // host: '192.168.31.235',
    port: port, // 端口
    open: true, // 自动开启浏览器
    compress: false, // 开启压缩
    overlay: {
      warnings: false,
      errors: false
    },
    proxy: {
      '/formapi': {
        target: 'http://192.168.2.15:10085',
        changeOrigin: true,
        pathRewrite: {
          '^/formapi': ''
        }
      },
      '/backstage': {
        target: 'http://36.138.232.124:10085',
        changeOrigin: true,
        pathRewrite: {
          '^/backstage': ''
        }
      },
      '/api': {
        target: 'http://36.138.232.124:10085',
        changeOrigin: true,
        pathRewrite: {
          '^/api': ''
        }
      },
      '/service': {
        target: 'http://36.138.232.124:10085',
        changeOrigin: true,
        pathRewrite: {
          '^/service': '/service'
        }
      },
      '/arcgis/rest': {
        target: 'http://36.138.232.124:6080',
        changeOrigin: true,
        pathRewrite: {
          '^/arcgis/rest': '/arcgis/rest'
        }
      }
    }
    // before: require('./mock/mock-server.js')
  },
  css: {
    // 是否使用css分离插件 ExtractTextPlugin
    extract: false,
    // 开启 CSS source maps?
    sourceMap: true,
    // css预设器配置项
    loaderOptions: {
      // pass options to sass-loader
      sass: {
        // 引入全局变量样式,@使我们设置的别名,执行src目录
        data: `@import "@/styles/index.scss";`
      }
    },
    // 启用 CSS modules for all css / pre-processor files.
    modules: false
  },

  configureWebpack: {
    name: name,
    resolve: {
      alias: {
        '@': resolve('src'),
        'staticPub': resolve('public')
      }
    },
    devtool: '#eval-source-map',
    plugins: [// 压缩代码
      new CompressionWebpackPlugin(
        {
          filename: '[path].gz[query]',
          algorithm: 'gzip',
          test: /\.js$|\.html$|\.json$|\.css/,
          threshold: 0, // 只有大小大于该值的资源会被处理
          minRatio: 0.4, // 只有压缩率小于这个值的资源才会被处理
          deleteOriginalAssets: false // 删除原文件 ,需要nginx配置支持
        }
      ),
      new webpack.ProvidePlugin(
        {
          $: 'jquery',
          jQuery: 'jquery',
          'windows.jQuery': 'jquery'
        }
      ),
      new TerserPlugin({
        cache: true, // 降低版本号后增加
        sourceMap: false, // 降低版本号后增加
        // 多进程
        parallel: true, // 降低版本号后增加
        terserOptions: {
          ecma: undefined,
          warnings: false,
          parse: {},
          compress: {
            drop_console: true,
            drop_debugger: true,
            pure_funcs: ['console.log'] // 移除console
          }
        }
      })
    ],
    optimization: {
      minimize: true, // 确保最小化是开启的（默认在生产模式下是开启的）
      minimizer: [
        new TerserPlugin({
          terserOptions: {
            compress: {
              warnings: false,
              drop_console: true,
              drop_debugger: true,
              pure_funcs: ['console.log']
            }
          }
        })
      ]
    }

  },

  chainWebpack(config) {
    // 删除预加载
    config.plugins.delete('preload')
    config.plugins.delete('prefetch')
    // 设置 svg-sprite-loader
    config.module.rule('svg').exclude.add(resolve('src/icons')).end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()
    // 设置保留空白
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config.when(process.env.NODE_ENV !== 'development',
      config => {
        config.plugin('ScriptExtHtmlWebpackPlugin').after('html').use('script-ext-html-webpack-plugin', [{
          // `runtime`必须与runtimeChunk名称相同。默认值为“runtime”`
          inline: /runtime\..*\.js$/
        }]).end()
        // 分割代码
        config.optimization.splitChunks({
          chunks: 'all',
          cacheGroups: {
            libs: {
              name: 'chunk-libs',
              test: /[\\/]node_modules[\\/]/,
              priority: 10,
              chunks: 'initial' // 仅打包最初依赖的第三方
            },
            elementUI: {
              name: 'chunk-elementUI', // 将elementUI拆分为一个包
              priority: 20, // 重量必须大于libs和app，否则将打包成libs或app
              test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // 为了适应cnpm
            },
            commons: {
              name: 'chunk-commons',
              test: resolve('src/components'), // 可以自定义规则
              minChunks: 3, //  最小公共数
              priority: 5,
              reuseExistingChunk: true
            }
          }
        })
        config.optimization.runtimeChunk('single')
      }
    )
  }

}